A) Rs. 9
B) Rs. 10
C) Rs. 11
D) Rs. 12
Correct Answer: D
Solution :
If average cost of 1 pen = Rs. x, then \[30x+75\times 2=510\] \[\Rightarrow \]\[30x=510-150=360\]\[\Rightarrow \]\[x=\frac{360}{30}\]= Rs. 12You need to login to perform this action.
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